Speaker
Description
Ultra-high energy neutrinos (>100 PeV) are expected to be unique messengers to the distant universe. This is because the other classic UHE messengers--photons and cosmic rays--are attenuated for sources further away than ~100 MPc. Additionally, as neutral and weakly interacting particles, neutrinos travel in straight lines, and so they point at their sources. However, the flux of UHE neutrinos is expected to be extremely low, requiring immense detectors approaching 100 km2 in size. In this talk, I will overview existing and future experimental efforts to find this UHE flux, most of which rely on the radio-Cherenkov (Askaryan) emission produced in neutrino nucleon interactions in dense media such as glacial ice.